Lead sheathing is one of the best materials for service life of cables under high stress. Lead extruders are used to apply lead sheathing to cables or vulcanized rubber tube. It is a fully automated machine so that the wire winder carries a sensor which enables the winding and the extrusion sections to run in synchronism. the unique design for strict control of temperature in every section also makes temperature and extrusion pressure constant at each section. Thus the thickness of the lead layer can be controlled within a very tight tolerance. The melting furnace, the purifying & holding furnace, and lead conveyor all work in an enclosed system.